Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1979-03-14
1981-08-11
Miller, J. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361155, H01H 4710
Patent
active
042837480
ABSTRACT:
A circuit arrangement operates a heavy-duty electrical equipment including an electrical relaying device having a relay coil and a set of first and second relay contacts. The first relay contacts are connected in a circuit that supplies a large amount of current to the electrical equipment. The relay coil is connected to be energized with a small amount of current in response to the closure of a normally open switch and held energized in response to the closure of the second relay contacts. The normally open switch and the second relay contacts form a closed low impedance circuit which supplies an arc current pulse to the second relay contacts during the time when the normally open switch is held closed, whereby fragmentary objects or dust collected between the second contacts is removed as the first and second contacts chatter during a closing.
REFERENCES:
patent: 1717247 (1929-06-01), Perry
patent: 2344654 (1944-03-01), Stong
patent: 2404982 (1946-07-01), Owens et al.
patent: 2610231 (1952-09-01), Wettstein
patent: 2789253 (1957-04-01), Vang
Miller J. D.
Nissan Motor Company Limited
Schroeder L. C.
LandOfFree
Circuit arrangement for operating heavy-duty equipment using ele does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit arrangement for operating heavy-duty equipment using ele, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit arrangement for operating heavy-duty equipment using ele will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028973